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Angel L. Mateo

2006-Apr-06 08:40 UTC

[Xen-users] different vlans in different domU''s

Hello,

I am trying to configure xen to work with the same configuration:

* I have dom0 with one ethernet interface connected to my network. This
interface (eth0) has an IP address in the vlan assigned to its port (the
"typical" configuration).

* I have a domU which ethernet interface is in the same network (and
vlan). I configure this domU as:

vif = [ '''' ]
ip="<its ip>"
netmask="<its netmask>"
gateway="<its gateway>"
hostname="<its hostname>"

this domU is working perfectly. I can boot it and I can connect to its
services (for example, ssh).

* I have another domU I want it to be connected to a different vlan,
although I want to use the same ethernet physical interface.

So I want to know how do I have to configure this domU so its network
works.

In a typical configuration (without xen) I have to do:

1. vconfig add eth0 <vlan_id>: To create a virtual interface connected
to this vlan. This virtual interface will tag all sent packets with the
corresponding vlan tag.
2. Configure the interface eth0.<vland_id> with its corresponding IP
address, netmask, etc.

If a do this, I can work with the new IP, so the network switch is
correctly configured.

My problem is that I am trying to configure it (with xen) as:

1. I create the eth0.100 (for vlan id 100) interface with the vconfig
command.
2. I do an ifconfig eth0.100 up
3. I create a new brigde called xen-br100
4. I run: /etc/xen/scripts/network start netdev=eth0.100
bridge=xen-br100 antispoof=no
5. I configure the domU as:

        vif = [ ''bridge=xen-br100'' ]
        ip="172.19.3.123"
        netmask="255.255.255.0"
        gateway="172.19.3.254"
        hostname="a hostname"

(this IP, netmask and gateway is the corresponding to my vlan 100).

With this configuration, network seems to work (just seems), because I
can ping to its IP address. The problem is that I can''t contact with it
by udp neither tcp, just by icmp. But I run tcpdump in dom0 on the
eth0.100 interface, I can use all network functions in the domU (tcp and
udp too).

I have also check that I haven''t got any filter (iptables or other)
that
could filter it.

I don''t know what I''m doing wrong. I''m not sure of
needing another
bridge to this configuration (to work without xen, I don''t need any
bridge to tag an interface). I''ve just followed the instructions found
in the xen howto at http://wiki.xensource.com/xenwiki/XenNetworking.

I guess this isn''t an unsual configuration (having different domUs
running in the different networks and vlans), so I guess it could be
there a solution to this configuration.

-- 
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información       _o)
y las Comunicaciones Aplicadas (ATICA)      / \\
http://www.um.es/atica                    _(___V
Tfo: 968367590
Fax: 968398337



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

John Cianfarani

2006-Apr-08 18:32 UTC

head link

RE: [Xen-users] different vlans in different domU''s

For me I have to run the below command in my domU because of the checksum bug.

ethtool -K eth0 tx off 

Thanks
John

-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Angel L. Mateo
Sent: Thursday, April 06, 2006 4:41 AM
To: xen-users@lists.xensource.com
Subject: [Xen-users] different vlans in different domU''s

Hello,

I am trying to configure xen to work with the same configuration:

* I have dom0 with one ethernet interface connected to my network. This
interface (eth0) has an IP address in the vlan assigned to its port (the
"typical" configuration).

* I have a domU which ethernet interface is in the same network (and
vlan). I configure this domU as:

vif = [ '''' ]
ip="<its ip>"
netmask="<its netmask>"
gateway="<its gateway>"
hostname="<its hostname>"

this domU is working perfectly. I can boot it and I can connect to its
services (for example, ssh).

* I have another domU I want it to be connected to a different vlan,
although I want to use the same ethernet physical interface.

So I want to know how do I have to configure this domU so its network
works.

In a typical configuration (without xen) I have to do:

1. vconfig add eth0 <vlan_id>: To create a virtual interface connected
to this vlan. This virtual interface will tag all sent packets with the
corresponding vlan tag.
2. Configure the interface eth0.<vland_id> with its corresponding IP
address, netmask, etc.

If a do this, I can work with the new IP, so the network switch is
correctly configured.

My problem is that I am trying to configure it (with xen) as:

1. I create the eth0.100 (for vlan id 100) interface with the vconfig
command.
2. I do an ifconfig eth0.100 up
3. I create a new brigde called xen-br100
4. I run: /etc/xen/scripts/network start netdev=eth0.100
bridge=xen-br100 antispoof=no
5. I configure the domU as:

        vif = [ ''bridge=xen-br100'' ]
        ip="172.19.3.123"
        netmask="255.255.255.0"
        gateway="172.19.3.254"
        hostname="a hostname"

(this IP, netmask and gateway is the corresponding to my vlan 100).

With this configuration, network seems to work (just seems), because I
can ping to its IP address. The problem is that I can''t contact with it
by udp neither tcp, just by icmp. But I run tcpdump in dom0 on the
eth0.100 interface, I can use all network functions in the domU (tcp and
udp too).

I have also check that I haven''t got any filter (iptables or other)
that
could filter it.

I don''t know what I''m doing wrong. I''m not sure of
needing another
bridge to this configuration (to work without xen, I don''t need any
bridge to tag an interface). I''ve just followed the instructions found
in the xen howto at http://wiki.xensource.com/xenwiki/XenNetworking.

I guess this isn''t an unsual configuration (having different domUs
running in the different networks and vlans), so I guess it could be
there a solution to this configuration.

-- 
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información       _o)
y las Comunicaciones Aplicadas (ATICA)      / \\
http://www.um.es/atica                    _(___V
Tfo: 968367590
Fax: 968398337



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Angel L. Mateo

2006-Apr-10 08:48 UTC

head link

RE: [Xen-users] different vlans in different domU''s

El sáb, 08-04-2006 a las 14:32 -0400, John Cianfarani
escribió:> For me I have to run the below command in my domU because of the checksum
bug.
> 
> ethtool -K eth0 tx off 
> 	Thank you very much!!!! It solved the problem.

-- 
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información       _o)
y las Comunicaciones Aplicadas (ATICA)      / \\
http://www.um.es/atica                    _(___V
Tfo: 968367590
Fax: 968398337



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

John Cianfarani

2006-Apr-10 17:33 UTC

head link

RE: [Xen-users] different vlans in different domU''s

Glad to help!
There was another post a while back I''m not sure where it is now but it
had patches to the network startup scripts so you could add this into your
ifcf-eth0 etc files.  If you restart networking on the DomU you need to reapply
the command.

If I have a sec I will try to dig it up.

Thanks
John

-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Angel L. Mateo
Sent: Monday, April 10, 2006 4:48 AM
To: xen-users@lists.xensource.com
Subject: RE: [Xen-users] different vlans in different domU''s

El sáb, 08-04-2006 a las 14:32 -0400, John Cianfarani
escribió:> For me I have to run the below command in my domU because of the checksum
bug.
> 
> ethtool -K eth0 tx off 
> 	Thank you very much!!!! It solved the problem.

-- 
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información       _o)
y las Comunicaciones Aplicadas (ATICA)      / \\
http://www.um.es/atica                    _(___V
Tfo: 968367590
Fax: 968398337



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Xen users - Apr 2006 - different vlans in different domU''s

[Xen-users] different vlans in different domU''s

RE: [Xen-users] different vlans in different domU''s

RE: [Xen-users] different vlans in different domU''s

RE: [Xen-users] different vlans in different domU''s